Multiple-fuse plug



June 9, 1925.

G. T. wooDlN MULTIPLE Fussf'PLuG Filed July s, 1921 ffm Patented June 9,1925.

Unirse STATES PAT-ENT orifice.

'GEORGE TsWGODIL NEWPORT, NEW YORK, ASSIGNOR OF ONE-HALF TOWILLIAM S.TEOBIPE, 0F LAKEWOOD, -0HIO.

MULTIPLE-FUSE PLUG.

Application med my' ao, .1921. seriarNO. 488,520.

To all whom z't may' concern:

Bey it known that I, GEORGE T. 'WooDIN, ya citizen vot" the UnitedStates, residing at Newport, in the `'county of Herkimer and `State of"New York, khave invented a certain new and 'useful Improvement'in'Multi'ple-Fuse'Plugs, of 'which the following is a full,clear,'and'exact description, reference being had to the accompanyingdrawings.

This invention relates to multiple fuse plugsand has for its generalobject to provide a plug which shall combine efficiency with convenienceof operation, simplicity and'compactness of construction, and econ- `omyof production. 'I accomplish the forevgoing objects, and other and'morelimited objects which will appear hereinafter, in and through theconstruction and arrangelnient of parts shown in the drawing forminglapart hereof, wherein Fig. 1 represents a central longitudinalsectional view through a multiple fuseplugembodying my invention, thecentral Contact, somerof the parts "connected thereto, and `the fusesbeing shown in elevation;Fi`g. v2 la plan view of the( base,'corresponding substantially to the line 2-2 of l; Fig. 3 a bottom plan'view'of the cap, corresponding substantially to the line 3 3 of Fig. 1;Flg. 4 a bottom plan view of the magazine part of the base,corresponding substantially to the line 4-4 of Fig. 1; Fig. 5 a detailin section corresponding to the line 5 5 of Fi 3; and Fig. 6 an enlargedsectional detai showing the manner of su porting the contact arm fromthe capk an of establishing contact between said arm and the centralcontact.

Describing the various parts by reference characters, 1 denotes the uper magazine member and 2 the lower soc et-connection member of a base.The member 2 is provided with the usual shell plug contact 3 which isadapted to fit a threaded socket shell contact (not shown). The upperend of the sheet metal of which the contact 3 is composed is flangedinwardly above a flat seat 2 on top of the member 2, the fiangeconstituting an annular contact surface 4. p

The upper member 1 of the base is cylindrical in shape and is providedwith a plurality of bores 5 located within and near the peripheralportion thereof. Six such bores are shown, spaced equidistantly apartand `equidistantly from the center or axis of the said member.

6 denotes an annular contact plate secured inlany suitable manner to thevbottom of the member l and extending Abeneath andy closing the)bottomsof the bores The inner edge 6 of this plate rests upon and formsan electrical contact lwithin the annular contact surfacell. The member2 is provided with acentral recess 2b in the top thereof land theemember1 with aY cor- 'at-1F and 2, and is-provided within-a recess 9 in theupper yend of the member 1 with-a nut 10 whichserves to draw and Iholdthe members land v2l rigidly together. j Mounted within the bores orchambers 5 are the fuses,3 each fuse being `of the cartri'dgetype vand'consisting' of an ordinary `fuse wire (not shown) having its ends'inelectrical rcontact with the opposite Vmetallic ends 11a of-a casing 11.In 'order' to insure an efficient contact between the lower ends of thecasings 11 and the plate 6, the latter is embossed upwardly beneath eachsuch container, as indicated at 6*.

Rotatably mounted upon the base and carrying a contact arm electricallyconnected with the contact 7 is a rotatable cap 13. The upper peripheralportion of this cap is pre erably lrnurled, as indicated at 13, the capbeing provided with a skirt 13h depending from the body thereof andoverlapping the upper end of the member 1. The cap is providedwithacentral bore 13c having annular extensions 13dl and 13e at the topand bottom thereof, respectively. Mounted .in the annular extension 13is a sheet metal hub 14 carrying a contact arm 15. This arm isdownwardly convex in cross section, as will appear from Figs. 5 and 6,whereby its lower surface tends to lie below the tops of the fusecasings, but the arm is enabled to ride up on top of the said casings asit is rotated by the cap. The hub 15 is clamped to the cap by means of asleeve 16 having a head 17 at the lower end thereof adapted to engagethe hub, the said sleeve fitting within the boi'e 13" and beinginternally threaded. This sleeve is secured in place b y means of asecond sleeve 17 threaded thereinto and having a head 18 atapted to fitwithin the recess 13m. The sleeve 17 is threaded upon the contact 7,which can turn freely within the bore 2C.

lVith the parts constructed and arranged as described, the operationwill be readily understood. The base is screwed into its proper socket,with the arm 153 pressing downwardly upon the top of a casing llwhereby, when a switch is closed at the proper place, a circuit will beestablished through the shell plug contact 3, plate appropiiate fuse inthe casing ll, arm l5, members 16 and 1T, and central contact 7. Shouldthe particular' fuse wire in use burn out, it is necessary only to turnthe cap l?) sixty degrees, thereby bringing the contact arm l5 intoengagement with the top ot' another fuse casino', whereupon the circuitwill again be established through the fuse plug. The shape of the arm l5will enable the operator to determine by the sense of feeling when thesaid arm has been moved a sullicient distance to engage the top of a usecasing. Furthermore, the member l and the skirt 13b will in practicepreferably be provided with suitable indications adapted to registerwhen the contact plate l5 is in ope 'ative relation to each ot' the fusecasings. The top ot the cap 13 will also be provided with an arrowindicating the direction of rotation, thereby to prevent moving the arm15 above and in engagement with the casing of a burned-out fuse.

iVhen all ot' the fuses have been burned out, the 'ap may be easilyremoved and new cartridge fuses inserted into the chambers 5.

Having thus described my invention, what upwardly in each of saidchambers, a iluse casii'ig in each chamber adapted to engage theembossed portions of the plate at their lower ends respectively, and anarm iu electrical engagement with the`other oit said contacts andadapted by its rotation to engage the upper ends ot the said casingssuecessively.

2. A, device o'f the character described comprising a shell plug contactmember and a magazine member, a central contact member uniting the lirsttwo members, fuse casings in the magazine member and grouped about thecentral contact member and in electrical contact with the shell plugcontact, a contact arm cooperating with said fuse casings, and having acentral collar or hub, a rotatable cap having a central openingregistering with the opening in said hub or collar, a sleeve mounted inthe bore of said cap and having a head adapted to engage the hub orcollar, and a sleeve threaded into the first mentioned sleeve and to thecentral contact.

In testimony whereof, I hereunto ailix my signature.

(lflOll-Gll T. VOODIN.

